I have a Taz 5 with a Dual Extruder v3 and Marlin 1.1.5.44. It has been working fine so far. However, yesterday it stopped about 20 minutes into a print with a warning on the LCD regarding Thermal Runaway. I tried again today, same thing (this time after about 13 minutes). I am attaching a screenshot from the OctoPrint temperature graph. T0 (red) is set to 230º, T1 (yellow) is off, bed (red) is at 90º. From this graph it seems that at some point the thermistor goes crazy. Any ideas what might be wrong and/or what I can do to fix this?

Thanks!

Last edited by mcamou on Fri Jan 04, 2019 12:12 pm, edited 1 time in total.

If you are unable to get any heating up, it could be you have a failed heater cartridge. If you measure the resistance at room temperature, it should read ~20koms. If this is open, or significantly off it could be that it needs to be replaced.

Feel free to reach out to support@lulzbot.com if you have any issues about the testing, or need further assistance.

Thanks for the help! I re-crimped the thermistor wires as per viewtopic.php?t=7584 and it seems to have worked... I am 40 min into a print and the temperature is rock-solid so far. I will report back once the print is finished.